316L不锈钢表面激光熔覆Ni60合金涂层几何尺寸预测及组织性能分析

doi:10.19976/j.cnki.43-1448/TF.2024064

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Abstract A theoretical prediction model for geometry dimensions of single-layer single-track coatings was established by analyzing the interactions between metal particles, substrate, and laser beam during the laser cladding process. Based on the experimental results of laser cladding Ni60 alloy coating on the surface of 316L stainless steel, the regression equations between the correction coefficients and the process parameters were achieved by multiple regression analysis. Therefore, the modified prediction model of geometric dimensions of single-layer single-track coatings was obtained by introducing the correction coefficients into the theoretical prediction model. The validation experiment was carried out under the conditions of the laser power, the scanning speed, and the powder feed rate of 1 750 W, 3.5 mm/s, and 0.099 g/s, respectively. The results show that the average relative errors between the modified prediction and experimental values of melt width, melt height, and melt depth are 0.85%, 2.47%, and 6.05%, respectively. The prediction accuracy of the modified prediction model is significantly improved compared with that of the theoretical prediction model. The results of the validation experiments show the feasibility of the modified prediction model. The Ni60 alloy coating is rich in hard phases, and its microhardness can be up to 3.4 times of that of 316L stainless steel substrate, and its wear rate is about 50% of that of substrate. The strengthening effect is remarkable.

Key words： laser cladding Ni60 alloy modified prediction model hardness wear rate

Received: 10 July 2024 Published: 18 November 2024

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	LIU Lilan
	YANG Fan
	LI Sicong
	WANG Shen
	WANG Jiayi
	WU Ziying

Cite this article:

LIU Lilan,YANG Fan,LI Sicong, et al. Prediction of geometric dimensions and microstructure properties analysis of laser cladding Ni60 alloy coating on 316L stainless steel[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(5): 362-372.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024064 OR http://pmbjb.csu.edu.cn/EN/Y2024/V29/I5/362

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